I stayed for 5 nights at the top floor room. The room is spacious & clean as advertised. Because the room occupies the entire floor, it's like having the penthouse to myself, except that the shared bathroom is just down the stairs. :) Evan and Kim are both super friendly and very helpful in giving recommendations for food, things to do locally, and whatever questions you have. The building is also really close to Lumpini subway station so getting around is extremely easy.
Will def stay again when in Bangkok. Thanks Evan for being a great host!